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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2019
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
Net (Loss) Income for Earnings Per Share Calculations - Basic and Diluted | Three Months Ended June 30, | Six Months Ended June 30,
(In millions) | 2019 | 2018 | 2019 | 2018
Income (loss) from continuing operations after income taxes | $ | 483 |  | $ | 375 |  | $ | 299 |  | $ | (63 | )
Net income attributable to continuing operations noncontrolling interests | 13 |  | 5 |  | 21 |  | 18 |
Income (loss) from continuing operations available to Corteva common stockholders | 470 |  | 370 |  | 278 |  | (81 | )
(Loss) income from discontinued operations, net of tax | (1,077 | ) | 323 |  | (717 | ) | 674 |
Net income (loss) attributable to discontinued operations noncontrolling interests | 1 |  | (1 | ) | 5 |  | 6 |
(Loss) income from discontinued operations available to Corteva common stockholders | (1,078 | ) | 324 |  | (722 | ) | 668 |
Net (loss) income available to common stockholders | $ | (608 | ) | $ | 694 |  | $ | (444 | ) | $ | 587 |
Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table Text Block] |
(Loss) Earnings Per Share Calculations - Basic | Three Months Ended June 30, | Six Months Ended June 30,
(Dollars per share) | 2019 | 2018 | 2019 | 2018
Income (loss) from continuing operations attributable to common stockholders | $ | 0.63 |  | $ | 0.49 |  | $ | 0.37 |  | $ | (0.11 | )
(Loss) income from discontinued operations, net of tax | (1.44 | ) | 0.43 |  | (0.96 | ) | 0.89 |
Net (loss) income attributable to common stockholders | $ | (0.81 | ) | $ | 0.92 |  | $ | (0.59 | ) | $ | 0.78 |
Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table Text Block] |
(Loss) Earnings Per Share Calculations - Diluted | Three Months Ended June 30, | Six Months Ended June 30,
(Dollars per share) | 2019 | 2018 | 2019 | 2018
Income (loss) from continuing operations attributable to common stockholders | $ | 0.63 |  | $ | 0.49 |  | $ | 0.37 |  | $ | (0.11 | )
(Loss) income from discontinued operations, net of tax 1 | (1.44 | ) | 0.43 |  | (0.96 | ) | 0.89 |
Net (loss) income attributable to common stockholders 1 | $ | (0.81 | ) | $ | 0.92 |  | $ | (0.59 | ) | $ | 0.78 |
Share Count Information |
Share Count Information | Three Months Ended June 30, | Six Months Ended June 30,
(Shares in millions) | 2019 | 2018 | 2019 | 2018
Weighted-average common shares - basic 1 | 749.4 |  | 749.4 |  | 749.4 |  | 749.4 |
Plus dilutive effect of equity compensation plans 2 | 0.6 |  | — |  | 0.3 |  | — |
Weighted-average common shares - diluted | 750.0 |  | 749.4 |  | 749.7 |  | 749.4 |
Stock options and restricted stock units excluded from EPS calculations 3 | 7.8 |  | — |  | 7.8 |  | — |

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